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Message-ID: <cc60401b-ecb8-4907-af3e-bb437ae1421b@linaro.org>
Date:   Tue, 2 Aug 2022 10:41:42 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Arınç ÜNAL <arinc.unal@...nc9.com>,
        Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        "David S . Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Sean Wang <sean.wang@...iatek.com>,
        Landen Chao <Landen.Chao@...iatek.com>,
        DENG Qingfang <dqfext@...il.com>,
        Frank Wunderlich <frank-w@...lic-files.de>,
        Luiz Angelo Daros de Luca <luizluca@...il.com>,
        Sander Vanheule <sander@...nheule.net>,
        René van Dorst <opensource@...rst.com>,
        Daniel Golle <daniel@...rotopia.org>, erkin.bozoglu@...ont.com,
        Sergio Paracuellos <sergio.paracuellos@...il.com>
Cc:     netdev@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/4] dt-bindings: net: dsa: mediatek,mt7530: make trivial
 changes

On 30/07/2022 16:26, Arınç ÜNAL wrote:
> Make trivial changes on the binding.
> 
> - Update title to include MT7531 switch.
> - Add me as a maintainer. List maintainers in alphabetical order by first
> name.
> - Add description to compatible strings.
> - Fix MCM description. mediatek,mcm is not used on MT7623NI.
> - Add description for reset-gpios.
> - Remove quotes from $ref: "dsa.yaml#".
> 
> Signed-off-by: Arınç ÜNAL <arinc.unal@...nc9.com>
> ---
>  .../bindings/net/dsa/mediatek,mt7530.yaml     | 27 ++++++++++++++-----
>  1 file changed, 20 insertions(+), 7 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/net/dsa/mediatek,mt7530.yaml b/Documentation/devicetree/bindings/net/dsa/mediatek,mt7530.yaml
> index 17ab6c69ecc7..541984a7d2d4 100644
> --- a/Documentation/devicetree/bindings/net/dsa/mediatek,mt7530.yaml
> +++ b/Documentation/devicetree/bindings/net/dsa/mediatek,mt7530.yaml
> @@ -4,12 +4,13 @@
>  $id: http://devicetree.org/schemas/net/dsa/mediatek,mt7530.yaml#
>  $schema: http://devicetree.org/meta-schemas/core.yaml#
>  
> -title: Mediatek MT7530 Ethernet switch
> +title: Mediatek MT7530 and MT7531 Ethernet Switches
>  
>  maintainers:
> -  - Sean Wang <sean.wang@...iatek.com>
> +  - Arınç ÜNAL <arinc.unal@...nc9.com>
>    - Landen Chao <Landen.Chao@...iatek.com>
>    - DENG Qingfang <dqfext@...il.com>
> +  - Sean Wang <sean.wang@...iatek.com>
>  
>  description: |
>    Port 5 of mt7530 and mt7621 switch is muxed between:
> @@ -66,6 +67,14 @@ properties:
>        - mediatek,mt7531
>        - mediatek,mt7621
>  
> +    description: |
> +      mediatek,mt7530:
> +        For standalone MT7530 and multi-chip module MT7530 in MT7623AI SoC.
> +      mediatek,mt7531:
> +        For standalone MT7531.
> +      mediatek,mt7621:
> +        For multi-chip module MT7530 in MT7621AT, MT7621DAT and MT7621ST SoCs.

If compatible: is changed to oneOf, you can use description for each
item. Look at board compatibles (arm/fsl.yaml)

> +
>    reg:
>      maxItems: 1
>  
> @@ -79,7 +88,7 @@ properties:
>    gpio-controller:
>      type: boolean
>      description:
> -      if defined, MT7530's LED controller will run on GPIO mode.
> +      If defined, MT7530's LED controller will run on GPIO mode.
>  
>    "#interrupt-cells":
>      const: 1
> @@ -98,11 +107,15 @@ properties:
>    mediatek,mcm:
>      type: boolean
>      description:
> -      if defined, indicates that either MT7530 is the part on multi-chip
> -      module belong to MT7623A has or the remotely standalone chip as the
> -      function MT7623N reference board provided for.
> +      Used for MT7621AT, MT7621DAT, MT7621ST and MT7623AI SoCs which the MT7530
> +      switch is a part of the multi-chip module.

Does this mean it is valid only on these variants? If yes, this should
have a "mediatek,mcm:false" in allOf:if:then as separate patch (with
this change in description).

>  
>    reset-gpios:
> +    description:
> +      GPIO to reset the switch. Use this if mediatek,mcm is not used.

The same. Example:
https://elixir.bootlin.com/linux/v5.17-rc2/source/Documentation/devicetree/bindings/mfd/samsung,s5m8767.yaml#L155

> +      This property is optional because some boards share the reset line with
> +      other components which makes it impossible to probe the switch if the
> +      reset line is used.
>      maxItems: 1
>  
>    reset-names:
> @@ -148,7 +161,7 @@ required:
>    - reg
>  
>  allOf:
> -  - $ref: "dsa.yaml#"
> +  - $ref: dsa.yaml#
>    - if:
>        required:
>          - mediatek,mcm


Best regards,
Krzysztof

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